import {
    asyncRouterMap,
    constantRouterMap
} from 'src/router'
import { fetchAll } from 'api/admin/menu/index';
/**
 * 通过authority判断是否与当前用户权限匹配
 * @param menus
 * @param route
 */
function hasPermission(menus, route) {
    if (route.authority) {
        if (menus[route.authority] !== undefined) {
            return menus[route.authority];
        } else {
            return false;
        }
    } else {
        return true
    }
}

/**
 * 递归过滤异步路由表，返回符合用户角色权限的路由表
 * @param asyncRouterMap
 * @param roles
 */
function filterAsyncRouter(asyncRouterMap, menus, menuDatas) {
    const accessedRouters = asyncRouterMap.filter(route => {
        if (hasPermission(menus, route)) {
            route.name = menuDatas[route.authority].title;
            route.icon = menuDatas[route.authority].icon;
            if (route.children && route.children.length) {
                route.children = filterAsyncRouter(route.children, menus, menuDatas);
            }
            return true
        }
        return false
    })
    return accessedRouters
}

const permission = {
    state: {
        routers: constantRouterMap,
        addRouters: []
    },
    mutations: {
        SET_ROUTERS: (state, routers) => {
            state.addRouters = routers
            state.routers = constantRouterMap.concat(routers)
        }
    },
    actions: {
        GenerateRoutes({
            commit
        }, menus) {
            return new Promise(resolve => {
                fetchAll().then(data => {
                    const menuDatas = {};
                    for (let i = 0; i < data.length; i++) {
                        menuDatas[data[i].code] = data[i];
                    }
                    const accessedRouters = filterAsyncRouter(asyncRouterMap, menus, menuDatas);
                    console.log(accessedRouters);
                    commit('SET_ROUTERS', accessedRouters);
                    resolve();
                });
            })
        }
    }
};

export default permission;